WO2001086269A1 - Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen - Google Patents
Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen Download PDFInfo
- Publication number
- WO2001086269A1 WO2001086269A1 PCT/CH2000/000261 CH0000261W WO0186269A1 WO 2001086269 A1 WO2001086269 A1 WO 2001086269A1 CH 0000261 W CH0000261 W CH 0000261W WO 0186269 A1 WO0186269 A1 WO 0186269A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ccd array
- test specimen
- events
- microprocessor
- per unit
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
- G01N21/8903—Optical details; Scanning details using a multiple detector array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/898—Irregularities in textured or patterned surfaces, e.g. textiles, wood
- G01N21/8983—Irregularities in textured or patterned surfaces, e.g. textiles, wood for testing textile webs, i.e. woven material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/367—Fabric or woven textiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2551/00—Means for control to be used by operator; User interfaces
- B65H2551/20—Display means; Information output means
- B65H2551/22—Numerical displays
Definitions
- the present invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 11.
- the number of events or determines the density of planar bodies with a regular structure either manually by visual counting using a counting magnifying glass with a scale or using a measuring microscope, and the visual determination of the mean period length using an interference template to determine the number of events per unit length.
- the bodies are textile or metal fabrics, in which the number of events represents the number of threads in the fabric and the density represents the number of threads per unit length.
- the described manual, visual processes are tedious, time-consuming and prone to errors, while the known automatic processes require relatively expensive and complex installations and devices.
- the object of the present invention was to provide a method and apparatus which enables a quick, accurate and simple determination of the number of events per unit length. the density of regular structures of flat bodies allowed.
- the electronic data of this CCD array can be read out in a simple manner and preferably quickly and reliably evaluated using a microprocessor.
- the number of events per unit length can be easily determined by evaluating the data of the CCD array using Fourier transformation and determining the frequency with the greatest amplitude in the area to be expected.
- the section of the surface of the test specimen is preferably imaged via an optical lens on the CCD array arranged behind the lens.
- a lens can also be used which images the test pattern sharply on the CCD array.
- the optical system is advantageously designed such that it has a large edge sharpness and a high depth of field, so that structures of different sizes are sharp over the entire measuring length be mapped. This makes it possible, for example, to measure thick fabrics with thick threads and also thin fabrics with very fine threads with the same device with high accuracy.
- the optical system is preferably used with a fixed object and image width, so that no adjustment is necessary.
- the structure to be measured is supposed to be a regular structure, ie is not sensitive to the selection of the effective measuring location or the dimensions of the measuring range, irregularities may also occur in the measuring range.
- filters for example a band pass
- These irregularities can be filtered out before the Fourier transformation and the quality of the result can thus be improved.
- the filter can preferably be set in such a way that a band filter is activated beforehand on the basis of an estimated value to be expected.
- These filter values can either be recorded precisely, or a certain number of discrete filter values can advantageously be offered for selection. This has the advantage that the corresponding bandpass filter is very simply constructed or. can be realized.
- the range of the results of the Fourier transformation to be evaluated can simply be restricted in order to arrive at the result.
- the measuring point is preferably additionally illuminated.
- the optimal lighting can preferably be controlled by means of a microprocessor, as is known, for example, from photographic technology.
- the light is preferably applied obliquely to the test specimen in order to promote the shadow effect and to improve the recognizability of the different structure, for example of threads of textiles. This can also prevent direct scattered light or reflections from shiny test samples, which could have a negative impact on the measurement results.
- the illumination can advantageously also be carried out with infrared in order to avoid interference caused by the different colors.
- the duration of the illumination is advantageously controlled as a function of the image acquisition, and very short exposure times can be achieved by using the CCD arrays and illuminants, so that the illumination can take place using very short flashes.
- the method is therefore also suitable for measuring moving test specimens, for example, of fabric directly during or. following the manufacturing process.
- the method according to the invention allows the number of events per unit length to be determined very quickly and precisely in a simple and reliable manner.
- the means used are compared to conventional automatic methods, for example by means of Laser, much cheaper and can therefore also be used economically.
- Such devices can be constructed and manufactured very simply and inexpensively. In addition, the required dimensions are very small, so that such devices are advantageously suitable both for manual use and for the laboratory with a static device. As already described above, such devices can also be integrated as an additive in manufacturing devices for fabrics, and thus, for example, the compliance with the mesh sizes of fabrics can be continuously checked during production.
- the results obtained can either be displayed directly on the integrated display or, advantageously, can be fed via an interface, for example to a PC, which can also save the results of a large number of measurements and then allow statistical evaluations to be made.
- LEDs light-emitting diodes
- the electronics are advantageously implemented in SMD technology, which allows a very high degree of miniaturization and also has a low power consumption.
- the Fourier transformer is advantageously implemented by a microprocessor which can also evaluate the results and control the display and / or the interface.
- FIG. 1 shows the circuit diagram of a device for carrying out the method according to the invention.
- Fig. 2 shows the view of an inventive device for manual use.
- FIG. 1 schematically shows the structure of a device for carrying out the method according to the invention for determining events per unit length.
- a strip 2 of the test specimen 1 is imaged on a CDD array 3 via an optical system 4. Ie the image of the pattern of the test specimen 1 is created in a predetermined strip 2 in electronic form in the CCD array.
- the test specimen 1 is advantageously illuminated by means of a lighting fixture 5.
- the lighting fixture 5 is an LED, for example, which is controlled by a microprocessor 6.
- the microprocessor 6 due to the prevailing lighting conditions and possibly. of reflective properties of the test specimen 1 to control the luminous element 5 in terms of intensity and / or duration of illumination.
- a short illumination flash is sufficient to image the strip 2 of the test specimen 1.
- the illumination with infrared light can advantageously be carried out in order to determine the coloring or Filter out pattern effects.
- the microprocessor 6 also serves to perform the Fourier transformation of the data of the CCD array 3. Likewise, the microprocessor 6 can also just evaluate the frequency with the greatest amplitude of the Fourier transformation and calculate the number of events, in the illustrated case, the number of threads, per unit length and preferably also display them via the display 7.
- the control of the device, respectively. of the microprocessor 6 controlling the method can take place, for example, via switch 8.
- the result of the measurement can be improved by activating a bandpass filter by specifying the expected thread density, which only Represents frequencies in the specified range by the Fourier transformation and thus filters out errors which are caused by irregularities of the test specimen 1 in the strip 2.
- FIG. 2 also shows the view of a housing half 9 of a device according to the invention, as is optimized for manual use.
- a window 10 on the front side.
- the test specimen 1 is located directly in front of this window 10. Behind the window are five light-emitting diodes LEDs 5, which illuminate the test specimen 1 homogeneously for a short time for the measurement.
- the brightness and / or lighting duration of the diodes 5 is controlled by the microprocessor 6 in accordance with the illumination of the CCD array 3.
- the image of the test specimen 1 is projected onto the linear CCD array 3 by means of the optics 4.
- the data of the CCD array 3 are automatically read out by the microprocessor 6 and subjected to a Fourier transformation. That frequency, which has the highest amplitude within the search area that may have been entered beforehand, is converted into events per unit length and displayed on the digital display 7 as the measurement result.
- the search area mentioned can be switched or Button 8 can be set.
- the microprocessor 6 advantageously triggers and evaluates a series of sample measurements with different illumination times. The optimally illuminated test specimen 1 is then imaged on a narrow strip 2 by means of the optics 4 on the CCD array 3 and evaluated by the microprocessor 6 as explained above.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Wood Science & Technology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00920325A EP1281065A1 (de) | 2000-05-10 | 2000-05-10 | Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen |
PCT/CH2000/000261 WO2001086269A1 (de) | 2000-05-10 | 2000-05-10 | Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen |
AU2000240973A AU2000240973A1 (en) | 2000-05-10 | 2000-05-10 | Method and device for the determination of the number of events with respect to the density of regular structures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2000/000261 WO2001086269A1 (de) | 2000-05-10 | 2000-05-10 | Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001086269A1 true WO2001086269A1 (de) | 2001-11-15 |
Family
ID=4358074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2000/000261 WO2001086269A1 (de) | 2000-05-10 | 2000-05-10 | Verfahren und vorrichtung für die bestimmung der anzahl ereignisse resp. der dichte von regelmässigen strukturen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1281065A1 (de) |
AU (1) | AU2000240973A1 (de) |
WO (1) | WO2001086269A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008092430A2 (de) * | 2007-01-29 | 2008-08-07 | Georg Fritzmeier Gmbh & Co. Kg | Verfahren und einrichtung zum berührungslosen erfassen einer einbaulage eines bauteils |
CN102288607A (zh) * | 2011-06-20 | 2011-12-21 | 江南大学 | 基于数码显微镜的机织物密度检测仪 |
CN102288608A (zh) * | 2011-06-20 | 2011-12-21 | 江南大学 | 一种新的机织物密度自动检测方法 |
CN102788793A (zh) * | 2012-03-31 | 2012-11-21 | 江南大学 | 一种基于频谱分析的纬编针织物密度测量方法 |
WO2017116961A1 (en) * | 2015-12-30 | 2017-07-06 | Baxter Corporation Englewood | Measurement of syringe graduation marks using a vision system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59199836A (ja) * | 1983-04-23 | 1984-11-13 | 兵庫県 | 織物の組織判別方法 |
EP0277694A2 (de) * | 1987-02-05 | 1988-08-10 | Wetenschappelijk en Technisch Centrum van de Belgische Textielnijverheid, afgekort tot Centexbel | Verfahren zur Messung der Garndichte von Webwaren oder Maschendichte einer Strickware zwecks Rejustierung einer Produktionsmaschine |
GB2220743A (en) * | 1988-07-08 | 1990-01-17 | Leicester Polytechnic | Measurement method and apparatus |
EP0741290A1 (de) * | 1995-05-04 | 1996-11-06 | Mahlo GmbH & Co. KG | Verfahren und Vorrichtung zur Feststellung der Verzugswinkel in einer Textilbahn |
DE19535259A1 (de) * | 1995-09-22 | 1997-03-27 | Taurus Daten & Mestechnik Gmbh | Optische Abtastvorrichtung zur Vermessung von Oberflächenstrukturen |
DE19722607A1 (de) * | 1997-05-30 | 1998-12-03 | Michael F Braun | Selbsttätiges Verfahren sowie Einrichtung zum Bestimmen der Eigenschaften einer Probe |
-
2000
- 2000-05-10 AU AU2000240973A patent/AU2000240973A1/en not_active Abandoned
- 2000-05-10 WO PCT/CH2000/000261 patent/WO2001086269A1/de not_active Application Discontinuation
- 2000-05-10 EP EP00920325A patent/EP1281065A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59199836A (ja) * | 1983-04-23 | 1984-11-13 | 兵庫県 | 織物の組織判別方法 |
EP0277694A2 (de) * | 1987-02-05 | 1988-08-10 | Wetenschappelijk en Technisch Centrum van de Belgische Textielnijverheid, afgekort tot Centexbel | Verfahren zur Messung der Garndichte von Webwaren oder Maschendichte einer Strickware zwecks Rejustierung einer Produktionsmaschine |
GB2220743A (en) * | 1988-07-08 | 1990-01-17 | Leicester Polytechnic | Measurement method and apparatus |
EP0741290A1 (de) * | 1995-05-04 | 1996-11-06 | Mahlo GmbH & Co. KG | Verfahren und Vorrichtung zur Feststellung der Verzugswinkel in einer Textilbahn |
DE19535259A1 (de) * | 1995-09-22 | 1997-03-27 | Taurus Daten & Mestechnik Gmbh | Optische Abtastvorrichtung zur Vermessung von Oberflächenstrukturen |
DE19722607A1 (de) * | 1997-05-30 | 1998-12-03 | Michael F Braun | Selbsttätiges Verfahren sowie Einrichtung zum Bestimmen der Eigenschaften einer Probe |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008092430A2 (de) * | 2007-01-29 | 2008-08-07 | Georg Fritzmeier Gmbh & Co. Kg | Verfahren und einrichtung zum berührungslosen erfassen einer einbaulage eines bauteils |
WO2008092430A3 (de) * | 2007-01-29 | 2008-11-13 | Fritzmeier Georg Gmbh & Co Kg | Verfahren und einrichtung zum berührungslosen erfassen einer einbaulage eines bauteils |
CN102288607A (zh) * | 2011-06-20 | 2011-12-21 | 江南大学 | 基于数码显微镜的机织物密度检测仪 |
CN102288608A (zh) * | 2011-06-20 | 2011-12-21 | 江南大学 | 一种新的机织物密度自动检测方法 |
CN102788793A (zh) * | 2012-03-31 | 2012-11-21 | 江南大学 | 一种基于频谱分析的纬编针织物密度测量方法 |
WO2017116961A1 (en) * | 2015-12-30 | 2017-07-06 | Baxter Corporation Englewood | Measurement of syringe graduation marks using a vision system |
CN108601893A (zh) * | 2015-12-30 | 2018-09-28 | 百特恩格伍德公司 | 使用视觉系统来测量注射器分度标记 |
US20190019306A1 (en) * | 2015-12-30 | 2019-01-17 | Baxter Corporation Englewood | Measurement of syringe graduation marks using a vision system |
US10614587B2 (en) | 2015-12-30 | 2020-04-07 | Baxter Corporation Englewood | Measurement of syringe graduation marks using a vision system and related fundamental frequency processing |
AU2016381105B2 (en) * | 2015-12-30 | 2021-03-11 | Baxter Corporation Englewood | Measurement of syringe graduation marks using a vision system |
Also Published As
Publication number | Publication date |
---|---|
AU2000240973A1 (en) | 2001-11-20 |
EP1281065A1 (de) | 2003-02-05 |
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